Neel Temperature: Is Magnetisation Equal to Zero?

  • Context: Graduate 
  • Thread starter Thread starter Petar Mali
  • Start date Start date
  • Tags Tags
    Temperature
Click For Summary
SUMMARY

The Neel temperature is defined as the temperature at which staggered magnetization becomes nonzero, while the overall magnetization remains zero for both paramagnets and antiferromagnets. The discussion clarifies that at the Neel temperature (T_N), local magnetic moments begin to align oppositely, leading to a nonzero staggered magnetization. It is emphasized that magnetization is not an appropriate measure for characterizing the paramagnet-antiferromagnet transition, particularly in zero fields.

PREREQUISITES
  • Understanding of Neel temperature and its significance in magnetism
  • Knowledge of staggered magnetization and its role in antiferromagnetic materials
  • Familiarity with paramagnetic and antiferromagnetic transitions
  • Basic concepts of magnetic moments and their alignment
NEXT STEPS
  • Research the concept of staggered magnetization in antiferromagnetic materials
  • Study the behavior of magnetization in paramagnetic and antiferromagnetic transitions
  • Explore the implications of Neel temperature on material properties
  • Investigate the role of entropy in magnetic phase transitions
USEFUL FOR

Physicists, materials scientists, and students studying magnetism, particularly those interested in phase transitions in magnetic materials.

Petar Mali
Messages
283
Reaction score
0
One question? Neel temperature is temperature in which magnetisation is equal to zero?
 
Physics news on Phys.org
It is the temperature in which the staggered magnetization (= a measure on how much nearest neighbors tend to align oppositely) is nonzero. The magnetization is both zero for a paramagnet and an antiferromagnet.
 
Can I say for \sigma=0, T=T_N?
 
Petar Mali said:
Can I say for \sigma=0, T=T_N?

What do you mean by sigma=0? If you mean that the entropy is zero, I don't think so. It holds when all the local moments are 'fully' aligned(such that two nearest neighbors point in opposite directions). At the Neel temperature, such alignment starts to develop.
 
Sigma iz magnetisation!
 
Aha! The magnetization! :) In zero fields, the magnetization in the paramagnet-antiferromagnet transition should be always zero. It is not a suitable measure to characterize the transition.
 
Last edited:

Similar threads

Graduate Stability of persistent currents in superconductors regardless of temperature
  • · Replies 77 ·
3
Replies
77
Views
4K
High School What causes the drop of latent heat at lower temperatures in liquid helium?
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad Interpretation of temperature in liquids/solids
  • · Replies 83 ·
3
Replies
83
Views
8K
Undergrad Experiment on the variation of weight with temperature
  • · Replies 20 ·
Replies
20
Views
4K
Undergrad Trying to better understand temperature and entropy
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Alternative materials in high temperature superconductors
  • · Replies 13 ·
Replies
13
Views
3K
High School Volume of a solid at absolute zero
  • · Replies 11 ·
Replies
11
Views
2K
Undergrad Can a cloud of electrons be stabilized by interactions between them?
  • · Replies 7 ·
Replies
7
Views
2K
Graduate Determination of electron temperature in an ion source
  • · Replies 0 ·
Replies
0
Views
1K
Graduate Experiments for temperature dependence of persistent supercurrent?
  • · Replies 2 ·
Replies
2
Views
2K